Home / 388,334,548.73-535,901,656.75-209,718,419.86

Finding the Fourth Proportional to 388,334,548.73, 535,901,656.75 and 209,718,419.86

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Solution

The fourth proportional to 388,334,548.73, 535,901,656.75 and 209,718,419.86 is: 289,411,408.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,334,548.73 : 535,901,656.75 = 209,718,419.86 : x
  2. Step 2: Convert to fraction form
    388,334,548.73/535,901,656.75 = 209,718,419.86/x
  3. Step 3: Cross multiply
    388,334,548.73x = 535,901,656.75 × 209,718,419.86
  4. Step 4: Simplify right side
    388,334,548.73x = 112,388,448,653,966,112
  5. Step 5: Solve for x
    x = 112,388,448,653,966,112/388,334,548.73
  6. Step 6: Final answer
    x = 289,411,408.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.